To provide a radius end mill not causing increase of cutting resistance and increase of abrasion caused by generation of respective points of inflection of a first connection part of a bottom blade and a radius blade and a second connection part of the radius blade and an outer peripheral helical tooth.

A bottom blade rake surface 26 of a bottom blade 5 and a radius rake surface 24 of the radius blade 3 are continued and the point of inflection of the first connection part 1 of the bottom blade 5-the radius blade 3 is eliminated and the point of inflection, i.e., a level difference of the second connection part 2 between the radius rake surface 24 of the radius blade 3 and an outer periphery helical rake surface 28 of the outer peripheral helical tooth 7 is eliminated. Thereby, a helical rake surface 20 in which the respective rake surfaces of the bottom blade, the radius and the outer peripheral helical are continuously connected is formed.